CHINA-ENVIRONMENT-POLLUTION

Bijschrift:A woman covers her face as she walks past a billboard at the Forbidden City in Beijing on May 19, 2013. China will more than double the number of cities covered by air quality monitoring, as part of efforts to tackle heavy smog that has sparked huge public anger. Swathes of acrid haze have repeatedly shrouded large parts of the country in recent months, provoking outrage among Internet users and unusual outspoken calls for action, in the state-run media. AFP PHOTO / WANG ZHAO (Photo credit should read WANG ZHAO/AFP/Getty Images)

Bijschrift:

A woman covers her face as she walks past a billboard at the Forbidden City in Beijing on May 19, 2013. China will more than double the number of cities covered by air quality monitoring, as part of efforts to tackle heavy smog that has sparked huge public anger. Swathes of acrid haze have repeatedly shrouded large parts of the country in recent months, provoking outrage among Internet users and unusual outspoken calls for action, in the state-run media. AFP PHOTO / WANG ZHAO (Photo credit should read WANG ZHAO/AFP/Getty Images)

A woman covers her face as she walks past a billboard at the... Nieuwsfoto'sHorizontaal,Internationaal monument,Milieukwesties,Milieuschade,Peking,Reclamebord,Verboden Stad,Volwassen,Volwassen vrouwen,WandelenPhotographer AFPCollection: AFP 2013 AFPA woman covers her face as she walks past a billboard at the Forbidden City in Beijing on May 19, 2013. China will more than double the number of cities covered by air quality monitoring, as part of efforts to tackle heavy smog that has sparked huge public anger. Swathes of acrid haze have repeatedly shrouded large parts of the country in recent months, provoking outrage among Internet users and unusual outspoken calls for action, in the state-run media. AFP PHOTO / WANG ZHAO (Photo credit should read WANG ZHAO/AFP/Getty Images)